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| Number | Title | Issue Date |
| 8082746 | Refrigeration cycle device for vehicle In a refrigeration cycle device for a vehicle, a weak-inflammability refrigerant that does not ignite at a high-temperature heat source mounted in an engine compartment of the vehicle in a refrigerant single state is circulated in a refrigerant cycle. The refrigeran... | 12/27/2011 |
| 8082745 | Refrigeration cycle system A refrigeration cycle system is disclosed. A compression unit 11 for compressing the refrigerant by the drive force of a vehicle engine 4 is arranged in a housing 10 of a compressor 1. The flow rate of the refrigerant discharged from the ... | 12/27/2011 |
| 7854137 | Variable speed compressor motor control for low speed operation A variable speed drive is provided for a compressor in a refrigerant system. When a low load situation has been determined by the refrigerant system controls, the variable speed drive moves the compressor to a lower speed mode of operation. In this case, if a speed ... | 12/21/2010 |
| 7802440 | Compression system and air conditioning system A compression system for an air conditioning system includes first and second compressors. The first compressor includes a first compression chamber in which a fluid introduced from an outside of the first compressor is compressed, and a first case defining a first ... | 09/28/2010 |
| 7404701 | Refrigerating system having reciprocating compressor A refrigerating system includes: an evaporator (2) for performing a cooling operation as a refrigerant is evaporated; a compressor (4) for compressing the refrigerant discharged from the evaporator as a mover is reciprocally moved; a condenser (86 | 07/29/2008 |
| 7351043 | Horizontal compressor end cap A substantially horizontal compressor including a housing having a main body portion with an open end. An end cap is secured to the main body portion with the end cap being provided with a plurality of apertures. The hermetic terminal body of the compressor is seala... | 04/01/2008 |
| 7347061 | Oil checking device for compressor of air conditioning system An oil checking device for compressor of air conditioning system includes an oil container connected to an high-pressure part of the air conditioning system to receive refrigerant and oil from the high-pressure part, the oil container being formed of a transparent m... | 03/25/2008 |
| 7299792 | Centrifugal compressor with improved lubrication system for gear-type transmission A centrifugal supercharger includes a case presenting a compressor chamber and a transmission chamber. An impeller in the compressor chamber is mounted to a shaft that extends into the transmission chamber. The impeller shaft is drivingly connected to a power input ... | 11/27/2007 |
| 7296427 | Hybrid compressor device for a vehicle In a hybrid compressor for a vehicle where a vehicle engine is stopped when the vehicle is temporally stopped, a pulley, a motor and a compressor can be driven in independent from each other, and are connected to a sun gear, planetary carriers and a ring gear of a p... | 11/20/2007 |
| 7246507 | Air conditioner Provided is an air conditioner which has a separator with an oil tank for storing extra oil; a first oil return tube opening above the surface of the extra oil; and a second oil return tube opening below the surface of the extra oil. When the refrigeration cycle can... | 07/24/2007 |
| 7240502 | Method for controlling operation of air-conditioner A method for controlling operations of an air-conditioner includes: a step in which when an operation load of an air-conditioner increases, if an outputted compressing capacity of the air-conditioner is smaller than a compressing capacity corresponding to the operat... | 07/10/2007 |
| 7231783 | Oil control system for a refrigeration system A refrigeration system includes a compressor having a compressor housing and operable to compress a flow of refrigerant. A pump is operable to provide a flow of oil to the compressor. A portion of the oil mixes with the flow of refrigerant and the remainder of the o... | 06/19/2007 |
| 7222491 | Air conditioner and method for performing oil equalizing operation in the air conditioner An air conditioner including an outdoor unit including a first compressor and a second compressor connected in parallel to the first compressor, an outdoor unit connected in parallel to the outdoor unit, the outdoor unit including a first compressor and a second com... | 05/29/2007 |
| 7219503 | Quick-change coalescent oil separator A refrigeration system including a coalescent oil separator for removing oil from a refrigerant gas and oil mixture discharged from a compressor. Upon a pressure condition being exceeded a directional flow valve opens to allow the refrigerant gas and oil mixture to ... | 05/22/2007 |
| 7207185 | Vehicle air conditioning apparatus A vehicle air conditioning apparatus includes a refrigerant circulation circuit. The vehicle air conditioning apparatus has a variable displacement type compressor, a first pressure monitoring point, a second pressure monitoring point and an oil separator in the ref... | 04/24/2007 |
| 7204098 | Oil separation structure for refrigerant compressor The present invention relates to a structure for separating oil from a refrigerant gas containing the oil. The refrigerant gas is discharged from a refrigerant compressor which forms a part of refrigerating cycle to an external refrigerant circuit. The oil separatio... | 04/17/2007 |
| 7181922 | Automotive air conditioner A cooled air temperature detector detects the temperature of air that has just passed through a refrigerant evaporator. The detector detects air temperatures for a plurality of locations on the cooling unit. When determining a control condition (ON/OFF condition) of... | 02/27/2007 |
| 7140198 | Air conditioner The present invention is capable of eliminating the line unit in an air conditioner that includes a plurality of heat source units, and hold increases in onsite line construction to a minimum while making it possible to adjust the amount of refrigerant in the air co... | 11/28/2006 |
| 7094037 | Oil-cooled compressor An oil-cooled screw compressor which can maintain the discharge temperature of discharge gas at an appropriate level is provided. The oil-cooled screw compressor comprises a compressor body, an oil separation/recovery unit disposed in a discharge path extending from... | 08/22/2006 |
| 7082774 | Compressor oil removal in ammonia refrigeration system Automatic oil removal from an ammonia evaporator/low pressure vessel in a refrigeration system is disclosed. A liquid refrigerant level controller is utilized to drain the oil. The controller works under the principle of fluid thermal conductivity. Oil having lower ... | 08/01/2006 |
| 7059839 | Horizontal compressor end cap with a terminal, a visually transparent member, and a heater well mounted on the end cap projection A substantially horizontal compressor including a housing having a main body portion with an open end. An end cap is secured to the main body portion with the end cap being provided with a plurality of apertures. The hermetic terminal body of the compressor is seala... | 06/13/2006 |
| 7059837 | Variable speed oil-injected screw compressors The invention relates to the use of variable speed control of the cooling fan on a variable speed oil-injected screw compressor. A screw compressor (11) comprises at least one stage of compression, each with a pair of rotors, variable speed compressor drive m... | 06/13/2006 |
| 7043926 | Cargo area grocery chiller Method and apparatus for supplying refrigerated air to a localized volume in a vehicle, suitable for the transport of groceries and other perishables. The localized volume is created by insulated panels in the storage area of a vehicle. The chiller unit includes an ... | 05/16/2006 |
| 7036329 | Lowering of refrigerant emissions by cycling of a variable displacement compressor In order to reduce refrigerant leakage from an automotive air conditioning system, the leakage paths are kept sealed by automatically reducing the output of a variable displacement compressor (12) after initial operation of the engine for a predetermined numb... | 05/02/2006 |
| 6997000 | Refrigeration system and method of operation therefor The object of the present invention is to prevent refrigerant from flowing out into a vehicle compartment due to damage to an evaporator or piping associated therewith. A solenoid valve is arranged at an inlet of an evaporator, and a check valve is arranged at an ou... | 02/14/2006 |
| 6997001 | Method of operating a refrigeration cycle The object of the present invention is to provide a method of operating a refrigeration cycle which is capable of preventing oil from staying in an evaporator and ensures high coefficient of performance as well as sufficient circulation of oil. An electronic expansi... | 02/14/2006 |
| 6993920 | Heater cycling for improved oil return A method comprises the steps of (a) providing a refrigeration unit having a refrigerated or heated space and at least one measured operating parameter, (b) providing heat to the refrigerated space when the at least one measured operating parameter exceeds a first th... | 02/07/2006 |
| 6990822 | Pressure adjusting device for air conditioning system and air conditioning system equipped with the same The present invention relates to an air conditioning system provided with an outdoor unit having a compressor and an outdoor heat exchanger, an indoor unit having an indoor heat exchanger, and a gaseous refrigerant pipe connecting the indoor heat exchanger to the co... | 01/31/2006 |
| 6983793 | Dual evaporator air conditioning system and method of use A dual evaporator air conditioning system and method for use therewith to cool air in front and rear portions of a cabin of a vehicle. The dual evaporator air conditioning system includes primary and auxiliary HVAC units to cool the air in the front and rear portion... | 01/10/2006 |
| 6978634 | Separately air-conditionable vehicle air conditioning apparatus A vehicle air conditioning apparatus has discharging openings, each of which is disposed near a corresponding one of passenger seats. Accordingly, air discharged from air outlets does not flow so as to concentrate on one discharging opening and instead flows toward ... | 12/27/2005 |
| 6955058 | Refrigerant cycle with tandem economized and conventional compressors A refrigerant cycle is provided with tandem compressors. Only some of the multiple compressors are provided with an economized cycle, and an optional unloader valve for selectively returning flow from an economizer injection port back to suction. The present inventi... | 10/18/2005 |
| 6941767 | Compression mechanism oil equalizing circuit, refrigeration system heat source unit, and refrigeration system provided with the same The present invention provides an oil equalizing circuit that can improve the reliability of the oil supply to the compression mechanisms in a refrigeration system provided with a plurality of compression mechanisms. The compressor group of the air conditioning syst... | 09/13/2005 |
| 6928828 | Tandem compressors with economized operation A refrigerant cycle includes economized tandem compressors. The refrigerant cycle is also provided with a common economizer circuit for all tandem compressors. Common manifolds communicate discharge, suction and economizer return flows within the refrigerant cycle t... | 08/16/2005 |
| 6925822 | Oil return control in refrigerant system Several control algorithms reduce the likelihood of insufficient oil return to the compressor. One algorithm is useful in a multi-circuit refrigerant system. A control reduces the cooling capacity of one of the circuits if the number of compressor start/stop cycles ... | 08/09/2005 |
| 6886354 | Compressor protection from liquid hazards Two liquid levels are sensed in the oil sump of a compressor to determine if sufficient oil and excess refrigerant are present prior to starting the compressor and appropriate steps taken, if necessary. At start-up, and during operation, the presence or flow of liqu... | 05/03/2005 |
| 6874328 | Hybrid compressor device In a hybrid compressor for a vehicle where a vehicle engine is stopped when the vehicle is temporally stopped, a pulley, a motor and a compressor can be driven in independent from each other, and are connected to a sun gear, planetary carriers and a ring gear of a p... | 04/05/2005 |
| 6834513 | Crankcase heater control A controller for controlling a heater associated with the crankcase of a compressor senses electrical current flowing through the heater. The sensing is preferably accomplished by a transformer in combination with an amplifier providing a feedback signal to the cont... | 12/28/2004 |
| 6735965 | Air conditioning apparatus and control method thereof An air conditioning apparatus and control method thereof includes an inverter-type compressor and a two-stage variable-capacity compressor connected in parallel with their respective capacities controlled according to indoor air conditioning loads. Thus, the present... | 05/18/2004 |
| 6675607 | Swash plate type compressor An oil separator is provided on a bleeding channel inside the shaft 16. By integral rotation of the shaft 16 and a rotary valve, oil contained in a refrigerant gas is centrifuged via the oil separator. The separated oil is supplied to an interface between... | 01/13/2004 |
| 6637218 | Gas heat pump-type air conditioner The present invention provides a gas heat pump-type air conditioner that can reliably notify a user that the time for changing the engine oil of the gas engine that drives the compressor has arrived without stopping the operation of the gas engine. In a g... | 10/28/2003 |
